Slope Protection See also Soil Stabilization. Gabions as manufactured by Maccaferri Inc. Typical prices for gabions as described, placed by hand. Prices can be expected to vary based on quantity. Cost for stone is not included. Add for stone as required. Costs shown are per each gabion.
  Galvanized mesh
        6' x 3' x 3' CL@2.70 Ea 163.00 109.00 — 272.00
        9' x 3' x 3' CL@2.90 Ea 94.90 117.00 — 211.90
    12' x 3' x 3' CL@3.10 Ea 202.00 125.00 — 327.00
  Erosion and drainage control polypropylene geotextile fabric (Mirafi FW700)
    For use under riprap, hand placed CL@.011 SY 2.65 .44 — 3.09
Riprap Dumped from trucks and placed using a 15-ton hydraulic crane and a 10 CY dump truck. Riprap costs will vary widely. Add $1.00 per CY per mile for trucking to the site. Cubic yards (CY) per hour shown in parentheses are based on a 7-man crew. Use $2,500 as a minimum job charge.
  Typical riprap cost, per CY — CY 78.60 — — 78.60
  5 to 7 CF pieces (9.4 CY per hour) S5@.745 CY 78.60 32.30 15.60 126.50
  5 to 7 CF pieces, sacked and placed, excluding bag cost (3 CY per hour) S5@2.33 CY 78.60 101.00 48.70 228.30
  Loose small riprap stone, under 30 lbs each,
      hand placed (2 CY per hour) CL@.500 CY 78.60 20.20 — 98.80
Ornamental large rock Rock prices include local delivery of 10 CY minimum. Cubic yards (CY) per hour shown in parentheses are based on a 7-man crew. Equipment is a 15-ton hydraulic crane and a 10 CY dump truck. Use $2,500 as a minimum job charge. Expect wide variation in costs of ornamental rock.
  Volcanic cinder, 1,200 lbs per CY (8 CY per hour) S5@.875 CY 384.00 38.00 18.30 440.30
  Featherock, 1,000 lbs per CY (12 CY per hour) S5@.583 CY 422.00 25.30 12.20 459.50
Rock fill Dumped from trucks and placed with a 100 HP D-4 tractor. Rock prices include local delivery of 10 CY minimum. Cubic yards (CY) per hour shown in parentheses are based on a 3-man crew. Use $1,350 as a minimum job charge.
  Drain rock, 3/4" to 1-1/2" (12 CY per hour) S6@.250 CY 30.30 11.40 4.89 46.59
  Bank run gravel (12 CY per hour) S6@.250 CY 33.70 11.40 4.89 49.99
  Pea gravel (12 CY per hour) S6@.250 CY 33.70 11.40 4.89 49.99
  Straw bales secured to ground with reinforcing bars, bale is 3'6" long, 2' wide, 1'6" high.
    Per bale of straw, placed by hand CL@.166 Ea 6.00 6.71 — 12.71
  Sedimentation control fence, installed vertically at bottom of slope, with stakes attached,
            36" high woven fabric (Mirafi 100X) CL@.003 LF .37 .12 — .49
Stone tracking pad Washed 3" to 6" stone placed and removed at the site entrance to clean sediment from the tires of vehicles exiting the site. Typical size is 24' wide x 50' long x 12" deep (45 CY) Equipment is a wheel-mounted front end loader. Add the cost of excavation, bedding material and backfill if required.
  Per cubic yard, placed and removed S6@.250 CY 34.40 11.40 6.44 52.24
  Per pad 24' W x 50' L x 12" D (45 CY) S6@.250 Ea 1,550.00 11.40 289.00 1,850.40
  Per pad 24' W x 50' L x 6" D (23 CY) S6@.250 Ea 791.00 11.40 146.00 948.40
  Add for geotextile liner (muddy site) CL@.020 SY .65 .81 — 1.46
Drain inlet protection Sediment control for drains and curb inlets to meet National Pollutant Discharge Elimination System (NPDES) and state permit requirements. .
  Poly 14" x 21" sandbags — Ea .38 — — .38
  Sandbag filled with 40 lb. of gravel, placed and removed, no salvage CL@.083 Ea .93 3.36 — 4.29
  Sandbag barrier for a 5' curb inlet, 25 bags, placed and removed, no salvage CL@2.08 Ea 23.20 84.10 — 107.30
  Mulch-filled erosion control 8" diameter fiber sock, staked per liner foot of sock, no salvage CL@.040 LF 1.50 1.62 — 3.12

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